Portal Matter and Scotogenic-like Dirac Neutrino Masses
Abstract
Loops of portal matter (PM) fields, carrying both Standard Model (SM) and dark charges, can generate the necessary kinetic mixing (KM) between the ordinary and dark photons (DP) in vector portal scenarios thus allowing for interactions between visible and dark sector fields. Here we show that the field content of a previously considered model based on a partial E6-like UV-completion of such setups can generate light Dirac neutrino masses in the interesting range, ∼ 0.05 eV, at the one-loop level similar to what happens in scotogenic dark matter (DM) scenarios. While general E6−like PM scenarios have been shown to be easily probed at colliders, such as the HL-LHC, uniquely testing this specific subclass of these setups in a direct fashion is found to be somewhat more challenging.
Related
- Generation-separated hypercharges and dark charges: origin of flavor, neutrino masses, and dark matter
- From Dirac Neutrino Mass to Dark Radiation: An A4-Symmetric FIMP Dark Matter Framework
- Inelastic Dark Matter at LZ from Radiative Dirac Neutrino Mass Paradigm
- FIMP dark matter in the scotogenic model at low-reheating temperatures
- From Kination to Detection: Scotogenic Scalar Dark Matter
BibTeX
@misc{rizzo2026portal,
title = {{Portal Matter and Scotogenic-like Dirac Neutrino Masses}},
author = {Thomas G. Rizzo},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2607.15965},
eprint = {2607.15965},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.15965},
}
RIS
TY - UNPB
TI - Portal Matter and Scotogenic-like Dirac Neutrino Masses
AU - Thomas G. Rizzo
PY - 2026
DA - 2026/09/30
PB - arXiv
DO - 10.48550/arxiv.2607.15965
UR - https://arxiv.org/abs/2607.15965
AB - Loops of portal matter (PM) fields, carrying both Standard Model (SM) and dark charges, can generate the necessary kinetic mixing (KM) between the ordinary and dark photons (DP) in vector portal scenarios thus allowing for interactions between visible and dark sector fields. Here we show that the field content of a previously considered model based on a partial E_6-like UV-completion of such setups can generate light Dirac neutrino masses in the interesting range, ∼ 0.05 eV, at the one-loop level similar to what happens in scotogenic dark matter (DM) scenarios. While general E_6−like PM scenarios have been shown to be easily probed at colliders, such as the HL-LHC, uniquely testing this specific subclass of these setups in a direct fashion is found to be somewhat more challenging.
ER -